The PXT50B 4 1/8 XT Bush W/Bolt from Precision Inc is designed for high-performance applications requiring precision and durability. This bush features a robust construction, ensuring reliable operation in demanding environments. With a size of 4 1/8 inches, it is compatible with various pulley systems, providing a secure fit and optimal performance. The included bolt enhances installation efficiency, making it a preferred choice for professionals. This product meets industry standards, ensuring compliance and reliability in your mechanical setups.